Improvement in locks for fire-arms



L S. BUTTERFIELD.

Gun Lock.

No. 12,124. Patented Jan; 2, 1855.

PETERS. Phulo'lilhcgraphel. WashingfolL DfC.

UNITED STATES J. S. BUTTERFIELD, OF PHILADELPHIA, 'PENNSYLVANIA.

IMPROVEMENT IN LOCKS FOR FIRE-ARMS.

Specification forming part of Letters Patent No. 112,!24. dated January 2, 1855.

- specification, in which- Figure l is aside view of myimprovedlock, showing the hammer cocked. Fig. 2 is a similar view, showing the hammer discharged.

Similar letters refer to like parts.

a is the plate; I), hammer; c, cam; (2, mainspring; d, screw-fastening of same; e, sear; e, notch in the same; f, stop and guide; 9, searspring; h, slot in mainspring.

When the hammer is turned back, as seen in Fig. 1, the cam c hooks into the slot in the end of the mainspring d,while the connectingsear 6, being attached to the lower end of the cam c, it is drawn forward until the notch e fastens on the catch and guide f. The after end of the sear eis pressed down by thespring so as to make the notch 0' fall on the stop and guide f with perfect certainty.

\Vhen the hammer is cooked, as seen in Fig. 1, and it is desired to discharge the same, the after end of the sear e is raised, so that the notch 6 shall be clear of the stop and guide f, whereupon the mainspring d operates on the cam c, the hammer falls, and the sear comes back, the various parts assuming the position shown in Fig. 2. Y

The hammer may be held half-cocked, or in any other position desired, by having a corresponding notch made in the sear e.

The common trigger is used to raise the end of the sear e in discharging the hammer.

The spring 9 serves as a brace for the mainspring, as will be observed in the drawings.

Having thus described my invention, I claim- The combination of the sear ewith the cam c, (the latter operating in the sloth of the mainspring (1,) the respective parts being arranged in the manner herein set forth.

J. S. BUTTERFIELD.

NVitnesses:

J AOOB RAMBO, W. H. EINW'EOHTER. 

